Method for managing radio resources in communication system and apparatus for the same

Abstract

A beam management method, performed by a terminal in a communication system, includes receiving a control message including at least one parameter used for beam management from a first base station; performing a monitoring operation on a first beam configured between the first base station and the terminal based on the at least one parameter; detecting a beam problem in the first beam based on the monitoring operation; and in response to determination that the beam problem is detected in the first beam, performing a recovery operation on the first beam.

What is claimed is: 
     
       1. An operation method performed by a terminal in a communication system, the operation method comprising:
 configuring one or more cells with a base station; 
 performing a measurement operation for one or more candidate beams of a first cell among the one or more cells; 
 generating a medium access control (MAC) control element (CE) including an indication information of the first cell and an indication information of at least one candidate beam which is selected based on results of the measurement operation among the one or more candidate beams; and 
 transmitting the MAC CE to the base station, 
 wherein the one or more candidate beams are configured by the base station, and the MAC CE is used for beam failure recovery (BFR). 
 
     
     
       2. The operation method according to  claim 1 , wherein the MAC CE further includes measurement information of the one or more candidate beams. 
     
     
       3. The operation method according to  claim 1 , wherein, when the first cell is a secondary cell of the base station, the MAC CE for the secondary cell is transmitted in a primary cell among the one or more cells of the base station. 
     
     
       4. The operation method according to  claim 3 , wherein the MAC CE indicates to inactive the secondary cell. 
     
     
       5. The operation method according to  claim 1 , wherein resource information of a random access (RA) procedure for the BFR is received from the base station. 
     
     
       6. The operation method according to  claim 5 , wherein the resource information includes at least one of a RA preamble index, masking information, a preamble format of a physical random access channel (PRACH), and time-frequency resources of the PRACH. 
     
     
       7. The operation method according to  claim 5 , further comprising:
 when beam failure is detected in the first cell and the first cell is a primary cell of the base station, performing the RA procedure in the primary cell, 
 wherein the RA procedure is a contention-based RA procedure or a non-contention-based RA procedure. 
 
     
     
       8. The operation method according to  claim 7 , wherein:
 when a reference signal received power (RSRP) in the primary cell is greater than or equal to a threshold, the non-contention-based RA procedure is performed, and 
 when the RSRP in the primary cell is lower than the threshold, the contention-based RA procedure is performed. 
 
     
     
       9. The operation method according to  claim 7 , wherein:
 the non-contention-based RA procedure is performed in a time period corresponding a timer, and 
 when the non-contention-based RA procedure is not completed in the time period, the contention-based RA procedure is performed after the time period.